preg_match_all problem

[kingdm]

Hello everyone,

I have this problem regarding a form validation on my address field. I want my address to contain no special characters, except comma(,) and period(.).

I did the two, but on the script the problem is even the spaces is considered illegal. How can I make the space valid?

Here is the preg code:

if(preg_match_all('/[^a-z0-9_~\.,$]/i', $city_add, $invalid))
    {
       $errors2[] = "Your address contains invalid character: " . join('',array_unique($invalid[0]));
    }

Thanks.

[richie]

replace every space with:

\s

Anything that can be interpreted as regex must be escaped, or replaced somehow.

[Ashley_Sheridan]

Add this to the regular expression '\ ' (without the single quotes)

That's a backslash followed by a space character.